@44 I beg to differ.
This trope is about how super powers and large breasts go hand-in-hand. It differs from World of Buxom
because, in the latter, everyone and not just the supers get breasts. It differs from Buxom Is Better
because that is a supertrope that simply talks about large breasts, not even getting into any of the details.
Finally, it's different from Boobs of Steel
because that only covers melee fighters with large breasts and doesn't care whether or not they have large breasts.
To break it down into four categories, from the Marvel Universe
Jubilee: Has energy projection powers, but is generally depicted flat. An aversion of this trope, and completely distinct from Boobs Of Steel.
Black Widow: Is a Badass Normal
with spy training, knows plenty of martial arts, and has a big rack. Lacks superpowers so thus does not fit in this trope, but her melee combat ability qualifies her for Boobs Of Steel.
Jean Grey/Phoenix: One of the top psychics in the world, but is merely an athletic woman physically, and has large breasts. She has this trope, but not Boobs Of Steel, since her combat ability is based on energy projection and Psychic Powers
Rogue: Beyond her energy draining powers, she's a Flying Brick
. She also has large breasts. She qualifies for both tropes because she has an established power set and she's one of the top brawlers for her team.
Jennifer Walters: Here's the big kicker. Before her fateful blood transfusion with her cousin Bruce
, she was both unpowered and of normal build, so she had neither trope. But then said transfusion turned her into She-Hulk
, and, sure enough, explicitly among the powers she got was large breasts, which is as blatant as this trope ever gets. She also learned to fight quite well, so she also gets Boobs Of Steel. If she tries fighting as Jen (instead of Hulking Out
), she doesn't get either trope applied.